User Manual

USB-1408FS User's Guide Specifications
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Note 4: Extrapolating the long term drift accuracy specifications will provide the approximate long term drift
of the USB-1408FS intermediate input ranges.
Table 2. Accuracy, differential mode
Range Absolute Accuracy 25 °C (±mV) Absolute Accuracy 0 °C to 50 °C (±mV)
±20 V 10.98 49.08
±10 V 7.32 33.42
±5 V 3.66 20.76
±4 V 2.92 19.02
±2.5 V 1.83 14.97
±2 V 1.70 14.29
±1.25 V 1.21 12.18
±1 V 1.09 11.63
Table 3. Accuracy, single-ended mode
Range Absolute Accuracy 25 °C (±mV) Absolute Accuracy 0 °C to 50 °C (±mV)
±10 V 10.98 49.08
Table 4. Noise performance, differential mode
Range Typical counts Least significant bit
root mean square
(LSB
rms)
±20 V 8 1.21
±10 V 8 1.21
±5 V 9 1.36
±4 V 10 1.51
±2.5 V 12 1.81
±2 V 14 2.12
±1.25 V 18 2.72
±1 V 22 3.33
Table 5. Noise performance, single-ended mode
Range Typical Counts LSB
rms
±10 V 8.0 1.21
Analog output
Table 6. Analog output specifications
Parameter Conditions Specification
Resolution 12-bits, 1 in 4096
Output range 0 V to 4.096 V, 1 mV per LSB
Number of channels 2
Throughput (Note 5) Software paced 250 S/s single channel typical, PC-dependent
Single channel, continuous scan 10 kS/s
Dual channel, continuous scan,
simultaneous update
5 kS/s
Power on and reset voltage 0V, ±20 mV typ (initializes to 000h code)
Output drive Each D/A OUT ±15 mA
Slew rate 0.8 V/µs typ
Note 5: Maximum throughput scanning from PC memory is machine dependent.